Steam-boiler



C. E. PARKER.

(No Modql.)

STEAM BOILER.

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STEAM-BOILER.

" SPECIFICATION forming part of Leu-.ers Patent N0.524,1'15, dated August 7, 1894. i

Application tiled May 28, 1894.

Myinvention relates to steam genera tors The object of my invention consists in producing a water-tube steam generator, which shall be simple in construction, easily repaired, interchangeable parts, and rapid and 'effective steaming qualities.

For these purposes my invention consists in the following construction and combination of parts, the details of which will first be fully described, and the features of novelty .therein then set forth and claimed.

Figure 1 is an end elevation of a steam boiler embodying my invention. Fig. 2 is a vertical transverse section of the same. Fig. 3 is aside elevation of the steam boiler.

In the drawings-A represents the boiler as a whole. It consists preferably of four large vertical circulation tubes B, which also serve to support the weight of the parts of the boiler. The boiler is of rectangular shape.

the four sides of the boiler, and communicating with the four vertical circulation =tubes B, by the three-way couplings D.

E are four corresponding horizontal circulating tubes, communicating with the top of the vertical tubes B by three-way couplings F., and form the upper edges of the boiler structure.

Gis the water reservoir vand superheater, horizontally placed at about the level, or a little above, of the circulation tubes E. I-I are branch circulation tubes of which there lare preferably four, two on each side of the reservoir G, whichrserve as a free communication between the opposite pair of circulation tubes E and the reservoir.

All the tubes previously described are of serial No. 512,814. (No mais.)

much larger diameter or size than the steaming tubes proper, hereinafter described, so as to constitute a rigid and substantial framework for the support of the water-tubes in more immediate contact with the tire, and at the same time to provide a means of free circulation of the water continuously through the tube and allow the proper separation of the steam. i

I represents one of the series of the watertubes, each of which is connected to and starts from one of the bottom circulation-tubes O, and passes vertically'upward to a proper height above the fire-box and below the reservoir G, whence it passes horizontally across the boiler several times, by means of the return-bend coupling, and is finally led up to and connected with diagonally opposite upper horizontal circulation tube E. All the waterpipes I are disposed in the same manner.

A second series of return-bend water-tubes K are disposed substantiallyin the same manner as the series of tubes I, only that their arrangement is at right angles to that of the series of tubes I, the series K starting from the opposite pair of lower circulation tubes O and ending in the upper opposite pair of circulation-tubes E.

In both series of water-tubes I and K, each pipe in the series rises alternately from op-l posite sides of the circulation tubes O andvend in a similar manner in the upper circulationtubes E. O representsfour large horizontal circulat- I ing pipes, one at the base of and parallel with To provide a suitable opening for the admission of fuel, several of the pipes in the series K are omitted, as shown in Figs. l and 2. Itv has not been deemed necessary to show a brick-work or casing around the tubes, or a `nre-box or ash-pan.

L is the feed-pipe.

M is the Water-gage, and N the gage' cocks. O is the steam-pressure indicator, and P the pipe connecting the superheater with the water-gage cylinder.

Q is the fusible safety plug, and R connection for the live-steam pipe.

S is the safety-valve. l

In operation, the water being subjected to the products of combustion it becomes heated, and that portion being of lighter specific gravity than the colder portion, it rises in the water-pipes and K and circulation-tubes, the

the pipe-y steam being separated in the reservoir G from the water.

No matter how intense the heat or the telnperature of the water that portion of it which is more remote from the lire thanthat in immediate contact with the ire will ,beA relatively, or comparatively cooler and consequently of greater specific gravity. Consequently there isacontinual downwardly flowing current'through the outer tubes B into the tubes C, and upwardly through the series -of Water-tubes I and K to the tubes E, I-I and reservoir D, and downwardly again, as before, continuously.

1. 'In a steam-boiler the combination of a rectangular series of circulation tubes at the base of the boiler, disposed horizontally, a rectangular arrangement of horizontaltubes at the top of the boiler, a series of four vertical circulation tubes uniting each of the four corners of the lower horizontal with each of the corners of the upper horizontal circulation tubes, a series of water-tubes and a steam dome or reservoir connected with said circulation-tubes.

2. In a steam boiler, the combination of the upperrectangular horizontal circulation tubes, a steam dome or reservoir placed within and supported by said rectangular circulation tubes, and a series of inclined circulation tubes connecting the steam dome at intermediate points along the opposite sides with in- CHARLES E. PARKER.

Witnesses:

WILLIAM MAY, W. M. WATRoUs. 

